using System;

public class Program

{

    public static void Main()

    {

        double Days = double.Parse(Console.ReadLine());

        double Shefs = double.Parse(Console.ReadLine());

        double Torti = double.Parse(Console.ReadLine());

        double Goffreti = double.Parse(Console.ReadLine());

        double Pancakes = double.Parse(Console.ReadLine());

        double Day =((Torti * 45)+(Goffreti*5.8)+(Pancakes*3.20)) * Days * Shefs;

        double area = Day -  (Day/8);

        Console.WriteLine($"(area:F3)");

    }

}